Hi Nice Lady,
This may not necessarily be coming from your lungs. It could be bacteria in your mouth or even a small bowel dysbiosis. Could be h.pylori. You need to get some testing done to at least check these things. It is more likely tied to some type of bacteria verses hormones. I would suggest a microbial stool test and a breath test for bacteria and h.pylori. A naturopath or any alternatively inclined doctor could do these tests or you can get them at labtestingdirect.com without a prescription.
You could also try going on a candida/antibacterial type program. CandiGone product, candida diet. Let me know if you do the testing as I will be happy to go over the results with you.
Sincerely,
Brenda